How to Cut Cement Board: 3 Simple Ways

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What is the cement board?

It is an environmentally friendly green building material—ease of processing and durability of cement. Wood wool cement board began to be widely used in Europe in the 1940s, also has now become a widely used building material in the world.

It has broad practicability and excellent performance and has many advantages such as corrosion resistance, heat resistance, and corrosion resistance, easy processing, good compatibility with cement, lime, gypsum, and environmental protection.

What is the difference between the Meiyan cement board, the cement board, and how to cut the cement board?

Cement board is a kind of decoration material, which is as large as the gypsum board. The size is 1220X2440 (MM), the wood wool cement board is more delicate, and the beautiful rock is rougher. Clearwater slabs are exact water concrete slabs,

It belongs to one-time casting molding, without any external decoration, and directly uses the natural surface effect of cast-in-situ concrete as the finish, so it is different from ordinary concrete. The surface is flat and smooth; the color is uniform, the edges and corners are transparent.

There is no collision damage and pollution, but only on the surface; it is very natural and solemn to apply one or two layers of transparent protective agent. Fair-faced concrete is the most advanced form of expression in concrete materials, and it shows the essential aesthetic sense, embodying the taste of “plain facing the sky”.

How to cut cement board concrete has a simple, natural, and calm appearance. The inherent thickness and elegance are unmatched by some modern building materials. The softness, rigidity, warmth, and apathy of the material itself not only affects people’s senses and spirit but also expresses architectural emotions. Therefore, the architects believe that this is a noble and simple, seemingly simple, but actually more artistic than gold brilliant.

specification

Its general specifications: Length: 2000mm-2440mm

Width: 1000mm-1220mm

Common thickness: 4-12mm

The size of domestic plates is generally 1200 × 2400 or 1220 × 2440. The former is a household standard, and the latter is an international standard. (Other smaller sizes can cut at will)

According to the density, it can divide into three categories: high, medium, and low. The edges of low-density boards are rough after cutting, and the advantages of high-density boards are neat.

Fiber cement boards with different physical properties such as specifications and density have additional heat insulation and sound insulation properties. Generally speaking, the higher the thickness and the thicker the plate, the better the heat insulation and sound insulation performance. In addition, its insulation performance is worth recommending, such as the application in the power distribution room.

Sheet moving and cutting.

The fiber cement board itself is relatively heavy, and moving at least two people to complete the uncut board is required. The thickness of 4mm-6mm is a relatively thin plate. It needs to move carefully before installation.

Installing fiber cement board requires at least two people, one person stabilizes the board position, and one person fixes it with a unique nail.

Cutting fiber cement boards usually requires a chainsaw or a mechanical cutter. There are three ways to cut:

1. Thin plates can cut and broken with relatively heavy tools

2. Using a fiber cutter (Australian cutting method)

3. Thick plates or high-density plates need to be cut with a chainsaw

When cutting the board, pay attention to the wind direction, try to avoid the powder from inhaling into the body, wear a mask or special protective tools; the board powder entering the lungs for a long time may cause disease.

The installed and brushed fiber cement board has very little maintenance work. Thick plates and high-density plates have good impact resistance, but thin plates and low-density plates need to be protected from external forces. Compared with how to cut cement board, fiber cement board has good waterproof, fireproof, and sound insulation effects, and it will not produce termites, it is not easy to rot, and its corrosion resistance is better.

classification

At present, most domestic asbestos fibers are used for reinforcement. Also, This kind of fiber cement board is called chrysotile fiber cement slab; the other is asbestos-free fiber, using pulp and wood chips.

2. Divided to density: low density 0.9-1.2g / cm3, medium density 1.2-1.5g / cm3, high density 1.5-2.0g / cm3.

also, The shortcomings of high-density fiber cement boards are easily deformed, and the deformation coefficient of medium-low density products is smaller.

3. Divided to pressure: with or without a pressure plate. Medium and low-density fiber cement boards are all pressureless boards. Also, high-density boards are pressure boards.

Which requires specialized press production, which cannot be done by enterprises without a press. According to the density, the fiber cement pressure plate is divided into: 1) ordinary plate, density 1.5-1.75g / cm3; 2) superior plate, density 1.75-1.95g / cm3; 3) special excellent plate, density 1.95g / cm3 or more .

4. According to thickness: 1) Ultra-thin plate, 2.5-3.5mm; 2) Conventional plate, 4-12mm; 3) Thick plate, 13-30mm; 4) Ultra-thick plate, 31-100mm. General manufacturers cannot make ultra-thin plates and ultra-thick plates, which is also an important basis for measuring the production capacity and technical level of enterprises in the industry.

National industry standards:

JC / T412.1-2006 non-asbestos fiber cement slab,

JC / T412.2-2006 chrysotile fiber cement flat plate.

Features

Fire insulation: non-combustible Class A, the board will not burn when the fire occurs, will not produce toxic fumes, low conductivity, is an ideal insulating material.

Waterproof and moisture-proof: In a semi-open-air and high humidity environment, it can still maintain stable performance without sag or deformation.

Thermal insulation and sound insulation: low thermal conductivity, good thermal insulation performance, high product density, and good sound insulation.

Simple construction: Also, dry operation, simple installation, and fast installation of keel and plate.

Economical and beautiful: Lightweight, with the keel, effectively reduce the cost of engineering and decoration; uniform appearance color, flat surface, direct use can make the building surface color uniform.

Safe and harmless: lower than the national “radiation health protection standards for building materials,” the measured index is equal to the lawn value 20 meters away from surrounding buildings.

Fair processing and secondary decoration performance: According to the actual situation, sawing, drilling, engraving, drilling nails, finishing, pasting tiles, wall coverings, and other materials can be performed.

Installation method

First of all, according to the requirements of the drawing and the actual size of the site, The boom fixes the central keel horizontally on the floor.

The distance between the keels is about 1m, and the installation of the covering keels must be on the same horizontal plane.

When laying the fiber cement pressure plate, the long side direction of the plate must be perpendicular to the direction of the sub-keel, and the width direction of the container.

The screws are 15mm away from the edge of the board and 50mm away from the board angle.

0.5mm, starting from the middle when fixing the board, and then selecting the periphery. The gap between plates is not less than 5mm, large area

Leave an expansion joint at a distance of 10-15m from the top surface of the long aisle.

Therefore, water curing has two functions: one is to prevent cracking, and the other is to ensure that the cement is fully hydrated to complete the strength formation of the adhesive.

Of course, water spraying is a typical folk construction process. If it is a project, the daily Water dripping will be tiring, and it can not be accurately grasped.

What should we do?

Also, Special mortars will used; that is, different admixtures will add to the cement mortar so that the cement mortar has some other special functions.

In special mortars, if you want to solve the above problems, you need to add hydroxypropyl methylcellulose, which is called a water-retaining agent in the industry. After adding it, the drying time of the cement mortar is controlled, so there is no need to shower every day Water has been cured.

According to the difference in season and temperature, the full hardening of cement, that is, the curing molding period is generally 28 days in principle, but there are significant differences in the actual engineering. The specific curing period should be based on the combination of structure type, section size, concrete designation, cement type, etc.

Conditions

such as air temperature, humidity, evaporation, and curing technology are specifically determined, but the general 15-day curing intensity is generally sufficient in summer, and sometimes in winter, such as the pavement, sometimes the conditions are low, and it is difficult to achieve adequate intensity for two months. However, no matter what kind of curing diseases, the first 7 days must be ensured to cover the heat preservation and moisture conservation. For structures with severe curing conditions, warm Water, or even pressure, Water can be used for curing.

How to maintain the cement board?

Cement mortar plastering must remain watered to prevent cracking. It is scientific and must do.

However, Cement is a hydraulic material. It must pass through a good hydration process to achieve the desired strength of how to cut the cement board. After drying, the hydration process of the cement will end. In simple terms, if the hydration of cement takes 8 days to reach the ideal value, but it dries in 2 days, and the hydration process is terminated, its strength will be particularly loss. Therefore, timely watering every day is also to keep the cement hydration process continuing.